The city yesterday began soliciting proposals to build and operate a solar- and wind-energy facility on 75 of the 2,220 acres at the shuttered Fresh Kills landfill on Staten Island.

Officials said the 20 megawatts of electricity that could be generated would more than double the city’s current clean-energy capacity.

It would also be enough to power 6,000 homes.

But it would still be a blip on the 13,000 megawatts consumed here on a peak power day.

Staten Island Borough President James Molinaro, who didn’t get too far when he first proposed a wind farm at the Fresh Kills site in 2006, said he thought the project “will surely be a model for how renewable energy can be realized in the largest city in America.”

Responses to the request for proposals will be accepted starting May 24 and continue until as late as Feb. 15, 2013.

Construction is expected to start toward the end of 2013, the final year of the Bloomberg administration.